Code Quality: Replace is_double() and is_long() aliases.

Replace the two remaining non-vendor occurrences: `is_double()` becomes `is_float()` in the IXR `IXR_Value::calculateType()` method, and `is_long()` becomes `is_int()` in the `ftp_base::SetServer()` method. Behavior is unchanged; the canonical functions are exact equivalents.

Developed in WordPress#12192.
Follow-up to r62175.

Props soean, masteradhoc, westonruter.
Fixes #64913.


git-svn-id: https://develop.svn.wordpress.org/trunk@62669 602fd350-edb4-49c9-b593-d223f7449a82

Author: westonruter

src/wp-admin/includes/class-ftp.php

@@ -278,7 +278,7 @@ function Passive($pasv=NULL) {
 	}
 
 	function SetServer($host, $port=21, $reconnect=true) {
-		if(!is_long($port)) {
+		if(!is_int($port)) {
 	        $this->verbose=true;
     	    $this->SendMSG("Incorrect port syntax");
 			return FALSE;

src/wp-includes/IXR/class-IXR-value.php

@@ -47,7 +47,7 @@ function calculateType()
         if (is_int($this->data)) {
             return 'int';
         }
-        if (is_double($this->data)) {
+        if (is_float($this->data)) {
             return 'double';
         }